scholarly journals Charm form factors in QCD sum rules

2010 ◽  
Vol 207-208 ◽  
pp. 257-260
Author(s):  
M.E. Bracco ◽  
M. Chiapparini ◽  
F.S. Navarra ◽  
M. Nielsen
Keyword(s):  
Sum Rules ◽  
Form Factors ◽  
Qcd Sum Rules

scholarly journals ANALYSIS OF THE $B \to K^*_2(1430), a_2(1320), f_2(1270)$ FORM-FACTORS WITH LIGHT-CONE QCD SUM RULES

2011 ◽  
Vol 26 (37) ◽  
pp. 2761-2782 ◽  
Author(s):  
ZHI-GANG WANG
Keyword(s):  
Experimental Data ◽  
Light Cone ◽  
B Meson ◽  
Sum Rules ◽  
Form Factors ◽  
Distribution Amplitude ◽  
Qcd Sum Rules ◽  
Line Shapes ◽  
The Future

In this paper, we study the [Formula: see text] form-factors with the light-cone QCD sum rules, where the B-meson light-cone distribution amplitudes are used. In calculations, we observe that the line-shapes of the B-meson light-cone distribution amplitude ϕ+(ω) have significant impacts on the values of the form-factors, and expect to obtain severe constraints on the parameters of the B-meson light-cone distribution amplitudes from the experimental data in the future.

scholarly journals Analysis of the strong coupling form factors of Σ b NB and Σ c ND in QCD sum rules

2017 ◽  
Vol 41 (8) ◽  
pp. 083104 ◽  
Author(s):  
Guo-Liang Yu ◽  
Zhi-Gang Wang ◽  
Zhen-Yu Li
Keyword(s):  
Strong Coupling ◽  
Sum Rules ◽  
Form Factors ◽  
Qcd Sum Rules

scholarly journals Semileptonic Decays ofB(Bs)to Light Tensor Mesons

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Reza Khosravi ◽  
S. Sadeghi
Keyword(s):  
Sum Rules ◽  
Form Factors ◽  
Semileptonic Decays ◽  
Branching Ratios ◽  
Quark Condensate ◽  
Qcd Sum Rules ◽  
Frame Work ◽  
The Continuum

The semileptonicBs(B)→K2⁎(a2,f2)lν,l=τ,μ, transitions are investigated in the frame work of the three-point QCD sum rules. Considering the quark condensate contributions, the relevant form factors of these transitions are estimated. The branching ratios of these channel modes are also calculated at different values of the continuum thresholds of the tensor mesons and compared with the obtained data for other approaches.

scholarly journals ANALYSIS OF THE $B_q\to D_q(D_q^*)P$ AND $B_q\to D_q(D_q^*)V$ DECAYS WITHIN THE FACTORIZATION APPROACH IN QCD

2009 ◽  
Vol 24 (31) ◽  
pp. 5845-5860 ◽  
Author(s):  
K. AZIZI ◽  
R. KHOSRAVI ◽  
F. FALAHATI
Keyword(s):  
Experimental Data ◽  
Perturbative Qcd ◽  
Sum Rules ◽  
Branching Fraction ◽  
Form Factors ◽  
Transition Form ◽  
Qcd Sum Rules ◽  
Factorization Approach ◽  
Electroweak Penguin ◽  
Decay Widths

Using the factorization approach and considering the contributions of the current–current, QCD penguin and electroweak penguin operators at the leading approximation, the decay amplitudes and decay widths of [Formula: see text] and [Formula: see text] transitions, where q = u, d, s and P and V are pseudoscalar and vector mesons, are calculated in terms of the transition form factors of the Bq→Dq and [Formula: see text]. Having computed those form factors in three-point QCD sum rules, the branching fraction for these decays are also evaluated. A comparison of our results with the predictions of the perturbative QCD as well as the existing experimental data is presented.

scholarly journals Light cone QCD sum rules analysis of the axial transition form factors

2008 ◽  
Vol 799 (1-4) ◽  
pp. 105-126 ◽  
Author(s):  
T.M. Aliev ◽  
K. Azizi ◽  
A. Ozpineci
Keyword(s):  
Light Cone ◽  
Sum Rules ◽  
Form Factors ◽  
Transition Form ◽  
Qcd Sum Rules

scholarly journals Analysis of the strong vertices of Σc∗ND and Σb∗NB in QCD sum rules

2017 ◽  
Vol 32 (35) ◽  
pp. 1750203 ◽  
Author(s):  
Guo-Liang Yu ◽  
Zhi-Gang Wang ◽  
Zhen-Yu Li
Keyword(s):  
Strong Coupling ◽  
Sum Rules ◽  
Form Factors ◽  
Coupling Constants ◽  
Strong Interactions ◽  
Dirac Structure ◽  
Qcd Sum Rules ◽  
Analytical Functions ◽  
Heavy Baryons ◽  
Perturbative Part

The strong coupling constants not only are important to understand the strong interactions of the heavy baryons, but can also help us reveal the nature and structure of these baryons. Additionally, researchers indeed have made great efforts to calculate some of the strong coupling constants, [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], etc. In this paper, we analyze the strong vertices [Formula: see text] and [Formula: see text] using the three-point QCD sum rules under the Dirac structure of [Formula: see text]. We perform our analysis by considering the contributions of the perturbative part and the condensate terms of [Formula: see text] and [Formula: see text]. After the form factors are calculated, they are then fitted into analytical functions which are used to get the strong coupling constants for these two vertices. The final results are [Formula: see text] and [Formula: see text].

scholarly journals Investigation of the Rare ExclusiveBc*→Dsνν-Decays in the Framework of the QCD Sum Rules

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
V. Bashiry
Keyword(s):  
Correlation Function ◽  
Decay Width ◽  
Sum Rules ◽  
Branching Ratio ◽  
Form Factors ◽  
Gluon Condensate ◽  
Qcd Sum Rules

ExclusiveBc*→Dsνν-decay is studied in the framework of the three-point QCD sum rules approach. The two gluon condensate contributions to the correlation function are calculated and the form factors of this transition are found. The decay width and total branching ratio for this decay are also calculated.

scholarly journals QCD sum rules analysis of weak decays of doubly heavy baryons: the $$b\rightarrow c$$ processes

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
Zhi-Peng Xing ◽  
Zhen-Xing Zhao
Keyword(s):  
Correlation Functions ◽  
Sum Rules ◽  
Form Factors ◽  
Final States ◽  
Qcd Sum Rules ◽  
Leptonic Decays ◽  
Weak Decays ◽  
Heavy Baryons ◽  
Point Correlation ◽  
Comprehensive Study

AbstractA comprehensive study of $$b\rightarrow c$$ b → c weak decays of doubly heavy baryons is presented in this paper. The transition form factors as well as the pole residues of the initial and final states are respectively obtained by investigating the three-point and two-point correlation functions in QCD sum rules. Contributions from up to dimension-6 operators are respectively considered for the two-point and three-point correlation functions. The obtained form factors are then applied to a phenomenological analysis of semi-leptonic decays.

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